“The Senate campaign committee fully cooperated with the investigation. [David] Rosen worked hard for the campaign and we trust that when all the facts are in, he will be cleared,” Clinton lawyer David Kendall said in an e-mail to The Post.

Rosen goes to trial May 3 on charges of falsely underreporting the costs of the August 2000 gala – thus inflating the amount of campaign cash ostensibly raised for Clinton at the event.

Sen. Kennedy’s brother-in-law – New Orleans operative Ray Reggie – was the mystery witness who went undercover for the FBI for 2 ½ years and wore a wire to tape Rosen.

Sources told The Post Reggie never taped either Bill or Hillary Clinton during the time that he was working undercover for the FBI, from July 2002 through last December.